From Science Daily Imagine a runaway boxcar heading toward five people who can't escape its path. Now imagine you had the power to reroute the boxcar onto different tracks with only one person along that route. Would you do it? That's the moral dilemma posed by a team of Michigan State University...

By David Brooks, The New York Times The story of evolution, we have been told, is the story of the survival of the fittest. The strong eat the weak. The creatures that adapt to the environment pass on their selfish genes. Those that do not become extinct. In this telling, we humans are like all other...